<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/sanxing.css">
    <script src="js/jquery-3.2.1.min.js"></script>
    <script src="js/sanxing.js"></script>
</head>
<body>
<div class="main">
    <div class="pic">
        <ul>
            <li  style="left: 0px"><img src="images/1.jpg" /></li>
            <li><img src="images/2.jpg" /></li>
            <li><img src="images/3.jpg" /></li>
            <li><img src="images/4.jpg" /></li>
        </ul>
    </div>
    <span class="prve"></span>
    <span class="next"></span>
    <div class="btn">
        <ul>
            <li class="bj"></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</div>
</body>
</html>